The organization charged with winning GOP control of the Senate in 2014 set up a special fundraising webpage, headlined "STAND WITH RAND!"

Paul has been attempting to filibuster the nomination of John O. Brennan to be director of the Central Intelligence Agency. The senator has held the floor for nearly 12 hours. A number of fellow senators, including those in the leadership of the NRSC, have come to show their support of Paul by asking him questions. That has given Paul a break from constantly speaking.

"NRSC Chairman Jerry Moran and Vice Chairman Ted Cruz went to the Senate floor today to join his filibuster," the NRSC wrote on a fundraising page. "Please join them in standing with Rand!"

"[I]f you want to really help secure a Senate that believes in upholding the Constitution, donate below to help us gain the 6 seats needed for a Republican Majority," the NRSC wrote.

Riding the wave of social media attention to Paul's rare use of long talking filibuster, the website has been promoted on Twitter by NRSC Communications Director Brad Dayspring. "Don't stop now... it's 10:36 and Rand is still standing... #STANDWITHRAND," he tweeted.

The NRSC was substantially out-raised by the Democratic Senatorial Campaign Committee in January, the last month for which figures are available.